Improved lock



I"UNITED STATES PATENT OEEICE.

CHARLES CLAUDE, OF NEWARK, NEW JERSEY.

IMPRQVED LOCK.

Specification forming part of Letters Patent No. 33,476, dated October15, 186i.

T0 all whom it may concern.'

Be it known that I, CHARLES CLAUDE, of Newark, in the4 county of Essex,in the State of New Jersey, have inventeda new Improvement in Locks,whereby they are rendered more burglar-proof; and I do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, in which` Figure 1 is an elevation of the improvementattached to a well-known door-latch,

groove. Fig. 7 is the locking-plate B. Fig.'

8 is the plate that works into the revolving groove or sleeve in thekey.

The nature of my invention consists ot' a key with a stationary grooveon the periphery opposite the bit and a revolving grooved sleeve also onthe periphery, and of an attachment to any Aknown form of locks; oflocking-plates B Blocking into and holding thimble Fin its place untilthe key enters and frees the plates from the thimble; also,

lkey-plate D and locking-bolts HJ, which lock and hold key-hole orstop-plate G and thimble F in their positions till they are removed bythe key.

To enablelothers to make and use my in vention,I will proceed todescribe its construction and operation.

I attach my improvements to the face or side plate of any known form oflocks.

A is a thick escutcheon-plate to guide and steady the key to itsposition to unlock my improvements and also the common lock.

B B are lock-plates which "gear into and are held iirmly to thimble F byspring C, which irmly and securely holds in position thimble F.

D is a plate to iit into the revolving groove in the key, and is kept inits position by spring E. It the revolving grooved sleeve on the..periphery of the key is not inline with the stationary groove, theperiphery ot' the key will come in contact with. the plate, therebyvpreventing the revolution of the key.

F is the thimble, which has on its back side pin K, which comes inContact with the key-hole or stop-plate G, (which should be hardened tothe greatest intensity possible to prevent its being drilled to effectan entrance to unlock the common lock back of it,) which plate G islocked in its position when the key is not in the lock by bolt I-I, keptto its place by spring I, which spring I also keeps bolt .I down to itsposition to hold thimble F firmly in position when the key is not in thethimble.

The key-hole or stop-plate G has 'a pivot L, which is its fnlcrum. 'lheplate G is returned to position over the key-hole by the spring M whenthe keyis removed.

N Vis the key, having astationary groove O on its periphery opposite thebit, and a recessedrevolving grooved sleeve 0', that can be brought inline with the groove O'.

Operation: The revolving grooved sleeve O on the periphery of the key isbrought in line with stationary `groove O. The key is theninserted'tl'xrough the escuteheon-plate, and on its entrance the"lock-plates B B arepressed from locking position with the thimble F. Thekey also presses locking-bolts Il and .I from their contact withkey-'hole plate G and thimble F. The key is then revolved one-quarter ofa circle, thereby removing the key-holevor stop-plate G suliciently toallow the key to enter onto and connect with the.

common lock or latch to lock or unlock the same.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. The combination of stop-plate G with lock-bolt H and spring I.

2. Thimble F, in combination with lockbolt .I and spring I.

3. Key N, in combination with the lock, as

described.

CHARLES CLAUDE. Vvitnesses. l

HENRY J. GEEIBEE, M. HASKELL.

